Few-layer graphene domains are fabricated by modified LPCVD on Cu and the growth mechanism is schematically shown in the figure.
A new formula for box-minus operation, which separates the box-minus operation into sign and reliability operations, was derived. Its application in the sum-product algorithm (SPA) was also investigated. Both boxplus operation and box-minus operation were divided into sign operation and reliability operation. The results show that on using the box-minus operation, SPA can be implemented with less decoding latency and complexity.Keywords product, algorithm, sum, application, operation, minus, box Disciplines Engineering | Science and Technology StudiesPublication Details S. Tong, P. Wang, D. Wang & X. Wang, "Box-minus operation and application in sum-product algorithm," Electronics Letters, vol. 41, (4) pp. 197-198, 2005. This journal article is available at Research Online: http://ro.uow.edu.au/eispapers/1076Box-minus operation and application in sum-product algorithm S. Tong, P. Wang, D. Wang and X. Wang A new expression for box-minus operation, i.e. the inverse of box-plus operation, is derived, with which the box-minus operation can be implemented by a small look-up table. Its application in the sumproduct algorithm is investigated.Introduction: For the practical application of low density parity check (LDPC) codes [1], the implementation of the associated decoding algorithm, i.e. the sum-product algorithm (SPA), should be carefully considered. As for this problem, there have already been some results [2][3][4][5]. An efficient parallel implementation in the log-likelihood ratio (LLR) domain for SPA is proposed in [4] leading to less decoding complexity and latency, which involves two core operations, i.e. boxplus operation [6] and its inverse, called box-minus operation.In this Letter we derive a new expression for the box-minus operation, which separates the box-minus operation into sign and reliability operations and is more suitable for practical implementation.
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